Diarad_Sovim DIARAD SOVIM. Edition : 1 Rev : 4. OBJECT OF THE DOCUMENT : Definition of the software interface for the DPU. M.Lombaerts S.

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1 DIARAD SOVIM Reference : SOVIM -IRM -DAT/C-0001 Edition : 1 Rev : 4 Definition of the functions of the DPU Diarad_Sovim OBJECT OF THE DOCUMENT : Definition of the software interface for the DPU Authors : A.Chevalier M.Lombaerts S.Dewitte Page : 1

2 Table of content : 1 Modifications Introduction Block schematic of DIARAD_SOVIM Definition of the channels Description of the functions of the DPU Definitions: Definition of the tasks of the DPU for DIARAD_SOVIM : Science Program DIARAD (SPD) : Tasks : Flow Chart Telemetry : Science Packet Hardware status Software status : UIM test packets TMSD Commands TCs recognised by the DPU : Specific DIARAD TCs Radiometric TCs Automatic sequences Contingency left voltage procedure Contingency right voltage procedure Contingency left current procedure Contingency right current procedure Contingency Reset 5 procedure Contingency Reset 6 procedure Calibration of the V/Fs Macrocommands Definitions Macrocommand NORMAL Macrocommand DOUBLE Macrocommand TRIPLE STARTUP macrocommand DEEP sequence Acronyms...31 Page : 2

3 1 Modifications Edition Révision Date Pages modified seconds cycle (cancelled) All integrations on 10 sec basis with nine frames per cycle New syntax from Brusag incorporated Review of previous version Update with stimuli cmds, suppression of exception and report, definition of macrocommand, and new flow chart Change of multiplexor adressing sequence to take into account the properties of the Shutter temperature measuring circuit. Add chapter Change of power-up sequence Correction of AUTO Change of power-up sequence Correction of AUTO001 Page : 3

4 2 Introduction The aim of this document is to define the different operations that the DPU (Digital Processing Unit) must handle to control the DIARAD_SOVIM : To ensure the Power ON/OFF of DIARAD_SOVIM. To check the validity of the commands received and their transmission to the electronics of the radiometer To check the conformity of the status versus the command. To accumulate the counts at the output of the V/Fs of the radiometer. To create telemetry packets to be downloaded. To have an internal check procedure of its own functions. Remark : Due to the non-real time nature of the operations it is requested that the SPD check the validity of the execution of commands. The hardware interface between DIARAD_SOVIM and the DPU is defined in the DIDIM (Diarad Interface Document SOVIM), this one shows six measurement channels, two spare channels (use TBD), another channel to send commands, a channel to receive the status of the instrument and a clock channel needed to synchronise both latest. The different signals on those lines and the time sequence of the operations will be defined in this document. This document was completely revised considering the documents : 1) Sovim packet definition from BRUSAG (SOVIM/TN/041-BRU ver /2/2000). 2) Sovim packet definition from BRUSAG (ver 26-feb-2000) 3) Definition of commands from BRUSAG(ver 12-mar-2000) 4) Präsi_2.doc from BRUSAG (ver ) 5) Sequence_2 from BRUSAG (ver ) And considering the IRMB internal meeting of the and the project meeting at PMOD ( ). Page : 4

5 3 Block schematic of DIARAD_SOVIM Il Tp1 V 6 V 5 V 4 V 3 V 2 V 1 Ir Tp2 V 6 V 5 V 4 V 3 V 2 V 1 Ul P1 V6 V5 V4 V3 V2 V1 Ur P2 V6 V5 V4 V3 V2 V1 Rd3 Rd4 P1 Fbal T1 T5 T6 T7 Rd1 Rd2 P2 Bal T2 T4 T M U X 1 M U X 2 M U X 3 M U X 4 M U X 5 M U X 6 V/F1 V/F2 V/F3 V/F4 V/F5 V/F6 Canal 1 Canal 2 Canal 3 Canal 4 Canal 5 Canal 6 Commands register Status Register Cmd Stat Shift Clk The channels 1 to 6 are the six differential lines defined in the DIDIM, the register of commands and the status register have 16 bits. As a consequence, all commands except G1POW 1 and G1POW 0 are coded on 16 bits then transmitted on the serial differential line Cmd from the DPU to DIARAD_SOVIM. The hardware status is also coded on 16 bits and transmitted in serial form on the differential line Stat from DIARAD_SOVIM to the DPU. Page : 5

6 3.1 Definition of the channels Désignation Channel Il Current left Tp1 Temperature Peltier 1 (left) Ir Current right Tp2 Temperature Peltier 2 (right) Ul Voltage Left P1 Peltier 1 signal (left) Ur Voltage right P2 Peltier 2 signal (right) Rd3 Redondant Mux 3 Rd4 Redondant Mux 4 Fbal Fine balance (higher gain) T1 Temperature front aperture left T5 Temperature front aperture right T6 Temperature electronics ampli U right T7 Temperature electronics Mux I left Rd1 Redondant Mux 1 Rd2 Redondant Mux 2 Bal Balance Coarse (lower gain passive measurements) T3 Temperature base T2 Temperature left diaphragm (precision aperture) T4 Temperature right diaphragm (precision aperture) T8 Temperature V/F6 V6 Calibration Voltage 6 V5 Calibration Voltage 5 V4 Calibration Voltage 4 V3 Calibration Voltage 3 V2 Calibration Voltage 2 V1 Calibration Voltage 1 V 6 Calibration Current 6 V 5 Calibration Current 5 V 4 Calibration Current 4 V 3 Calibration Current 3 V 2 Calibration Current 2 V 1 Calibration Current 1 Page : 6

7 4 Description of the functions of the DPU The DPU must transmit to DIARAD_SOVIM the commands uploaded from ground and to download the acquired measurements. The DPU do tasks related to the check of his own internal functions and tasks related to the functions of DIARAD_SOVIM. Diarad_Sovim 6+2cnannels Status Commands UIM 1 D.P.U. CPM Télémétry Commands SIM Télémétry Commanss ISS canaux mesure Status Commandes Power On/Off UIM 2&3 DPU BUS TIM Page : 7

8 The commands (16 bits) modify the illumination or the occultation of the measurement channels, the choice of the measuring channel by way of the command of the multiplexors of the acquisition channels and the choice of the radiometric modes (sometimes called radiometric state). The DIARAD_SOVIM works on a succession of radiometric modes, each of them based on a 90 seconds duration. A radiative measurement is made of two radiometric modes, this gives a sampling period of 3 minutes. Each of the radiometric state is divided in nine frames. Each frame is the integration of the counts on a 10 seconds period. The TIM generate interruptions of the processor each 10 seconds and each 90 seconds. Radiometric State Time The data (multiple of 16 bits word) are transmitted to ground by the DPU (telemetry) are of two types ; Science and Housekeeping's. 4.1 Definitions: One radiometric state is divided in nine frames of 10 seconds. The packet number is a cumulative and unique count of radiometric state. The constant E is defined as the packet number modulo 2. Page : 8

9 4.2 Definition of the tasks of the DPU for DIARAD_SOVIM : One can define five main tasks dealing with DIARAD_SOVIM by the DPU : 1- The power ON/OFF of the experiment and the measure of the voltage and current on the power line. 2- The reception of the TC's uploaded, their interpretation and transmission to DIARAD_SOVIM. 3- To receive data from DIARAD_SOVIM, to pack and to download them. 4- To update the state of the 's of DIARAD_SOVIM. 5- G1POW1 and G1POW0 of DIARAD_SOVIM are directly done by the DPU all together with the measurement of the supply voltage and current done by the DPU. The TC's can be executed immediately after their receipt (Immediate TC) or at the beginning of a new radiometric state of 90 sec (Delayed TC). 4.3 Science Program DIARAD (SPD) : Tasks : - Wait for a 10 sec and 90 sec IRQ. - Read the TC buffer of the DPU. - Decode and check the TC. - Drop bad TC's. - Check the TC type (Immediate or Delayed). - Manage the AUTOxxx sequence with a RADxx update at each 90 sec IRQ. - Update the cmd register with new TC's : Immediately in case of an Immediate TC. On a 90 sec IRQ in case of a delayed TC or an AUTOxxx sequence update. - Set the addresses of the multiplexors. - Send the command to the UIM. - Read the data and radiometric state status from the UIM's. - Pack and send the TM at each 90 sec IRQ. Rem : There is no mention of the DPU TC's in the following flow chart as there are part of the DPU program and not the Science program. Page : 9

10 4.3.2 Flow Chart DIARAD 10 sec IRQ wait state Read TC buffer New DIARAD TC? Yes Valid TC? No Drop TC Yes Delayed TC TC type Immediate TC Set in "Delayed TC" buffer Update CMD register 90 sec IRQ? No Yes Update CMD register with RADxx or "Delayed TC" buffer Encapsulate DIARAD packet with previous data Send TM to ground Set mux Send cmd to UIM Read DIARAD status and data Page : 10

11 4.4 Telemetry : Each TM data packet will be preceded by a header. The header and packet's structure are explained below but the reference document is SOVIM-BRU- DAT/G-0001 (SOVIM COMMUNICATION) 4.1 Lead 02h = STX Trail 03h = ETX DIARAD TM Header Name Byte Nu b7 b6 b5 b4 b3 b2 b1 b0 id h=ASCII 49h=ASCII I I bc -2-1 lsb of byte msb of byte Count Count source 0 DPU = 80h ITE = 81h XPLC = 82h destination 1 DPU = 80h ITE = 81h XPLC = 82h class 2 0 = Data 1 = Cmd TM PID 3 DIARAD = 2h Cmd type : TC = 3h userdata 3+N chs 4+N with : id : Intel byte ordering. bc : Number of data bits, starting at byte nu.0 and not including chs. source : Source of packet. destination : destination of packet. class : bit 7 = 0 for downlink, TM for TM packet. type : MSNibble : instr id = 1 LSNibble : packet type = DiaSc for science packet userdata : N user bytes. N = 0 to FFF7h. chs : 2 s complement of byte addition from byte nu 0. Page : 11

12 4.5 Science Packet There is only one type of packet for DIARAD which is the science packet (ptyp0 = DiaSc). Each Science packet consists of 9 frames explained hereafter. Wrd nu\bit nu Frame nu. Mux 1_4 Mux 5 Mux 6 spare 1 msb Channel 1 measurement 2 lsb 3 msb Channel 2 measurement 4 lsb 5 msb Channel 3 measurement 6 lsb 7 msb Channel 4 measurement 8 lsb 9 msb Channel 5 measurement 10 lsb 11 msb Channel 6 measurement 12 lsb 13 Software status Frame Nu. : Frame number : 1 to 9. Mux 1_4 : Multiplexors 1 to 4 state (3 bits). Mux 5 : Multiplexor 5 state (3 bits). Mux 6 : Multiplexor 6 state (3 bits). Channel x : V/F's counts with 10 sec integration (24 bits coded on 32 bits) Software status : Status build from the hardware status sent by DIARAD (16 bits) Hardware status Word transmitted from DIARAD to the DPU : Bit Number Signification 0 Always 0 1 Always 0 2 Always 0 3 REF : Reference On/Off 4 BAL : Reference on both sides 5 SER : Servo On/Off 6 SSID : Servo side Left/Right 7 SYNC : Accessible from test connector 8 LSCS : Left shutter close 9 LSOS : Left shutter open 10 RSCS : Right shutter close 11 RSOS : Right shutter open 12 TBD 13 REFS : Step reference status 14 +5V : Always 1 15 GND : Always 0 Page : 12

13 4.5.2 Software status : A word generated by the DPU build from the hardware status with the following definition : Bit number Definition 0 Spare 1 Right shutter state 10 = Close 01 = Open 2 00 = Moving 11 = Error 3 Left shutter state 10 = Close 01 = Open 4 00 = Moving 11 = Error 5 Servo status 0 = Off 1 = On 6 Servo side status 0 = Left 1 = Right 7 Reference status 0 = Off 1 = On 8 Balance status 0 = Off 1 = On 9 Step Reference status 0 = Off (Ref High) 1 = On (ref Low) 10 Radiometric state bit Radiometric state bit 1 12 Radiometric state bit 2 ---> decimal value from 2 to Radiometric state bit 3 14 Radiometric state bit Synchronisation 0 = no sync (low) 1 = sync (high) Exemples : RAD05 : = = 14B4 RAD09 : = = 24AC RAD21 : = = 5794 Page : 13

14 4.6 UIM test packets Voir Document Brusa. The test packet's format is explained in the SOVIM packet definition (DPU.UIM) of BRUSAG. As there are 8 test frequencies, there will be 8 frames by packet (or cycle). IRMB requiere to have 9 frames by packet to be compatible with the duration of a science cycle (90 sec). This can be implemented with an additional test frequency or by duplicate an existing one (TBD). As all the DIARAD science data are acquired during long cycles, there is no need to have short cycle tests. The definition of the data fields for UIM 1 with one test frequency is explained hereafter. As there are 8 (9) test frequencies, these pattern has to be repeated 8 (9) times. Wrd nu\bit nu Frame nu. spare 1 msb Channel 1 measurement 2 lsb 3 msb Channel 2 measurement 4 lsb 5 msb Channel 3 measurement 6 lsb 7 msb Channel 4 measurement 8 lsb 9 msb Channel 5 measurement 10 lsb 11 msb Channel 6 measurement 12 lsb 13 Software status Data pattern for one test frequency. Frame nu. : Frame number from 1 to 8 (9). Software status : See The test frequencies are the following : tim_f khz Page : 14

15 4.7 TMSD. The Telemetry service data for DIARAD defined in the packet definition of Brusag must be replaced by the following description : P.-nu. SOVIM Service Data Packet size effective source 501 Temperature electronic T6 word DIARAD 502 Temperature electronic T7 word DIARAD 503 Status hardware word DIARAD 504 Current monitor word DIARAD 505 Primary voltage word DIARAD In case of a current monitor over range, the system (XPLC level) will take an appropriated action. Page : 15

16 5 Commands The resident software of the DPU is able to recognise a limited set of TC's. There are two specific sets of TC's (cfr. DIDIM ) : The DPU TC's and the instrument TC's. The TC's can be executed immediately after their receipt (Immediate TC) or at the beginning of a new radiometric state of 90 sec (Delayed TC). The Delayed TC's are SMMXX and EVF. 5.1 TCs recognised by the DPU : G1POW # Command : G1POW 1 Power ON procedure of DIARAD Action Effects : The resident software has to provide the power on of DIARAD. : - Power on of DIARAD - Send RAD04, RAD21, RAD02, RAD06, RAD17 10 sec each - Set DIARAD by default in radiometric mode RAD Verify the hardware status of DIARAD. - Immediate TC. Command : G1POW 0 Power OFF procedure off DIARAD Action : The resident software has to set the power off of DIARAD. Effects : - Send command IMDM 1 - Terminate the current radiometric state. - Send RAD 05 to DIARAD. - Wait the 10 sec period read the status and if both shutter closed. - Power off of DIARAD. - Immediate TC. Activation of the Science Program DIARAD (SPD). Command : G1SCP 1 Action : The resident software has to activate the SPD which manage the specific TCs of DIARAD. Effects : - Activate the SPD. - Immediate TC. Deactivation of the Science Program DIARAD (SPD). Command : G1SCP 0 Signification : The resident software has to deactivate the SPD which manage the specific TCs of DIARAD. Effects : - Deactivate the SPD. - Immediate TC. Page : 16

17 DPU Test procedure : Voir Document Brusag Command : Action Effects TST : The software sets the DPU in test mode. : - Sends patterns of data t o the DPU to check the communications and the different softwares. - Generate Test packets. - This TC is compatible with the TC G1ASC. - Immediate TC. Counter test procedure : Voir Document Brusag Command : UIM 1 Action : The resident sofware sets the UIM1 (dedicated to DIARAD)in test mode. Effects : - Apply 8 reference frequencies to the counter's inputs from the two Xtals So it gives 16 packages but 18 would be best. - Generate a test packet. - Immediate TC. - This TC is incompatible with the science acquisition mode. Page : 17

18 5.2 Specific DIARAD TCs All TC received by the DPU is checked for conformity with the following list. If it is not a valid command, after the activation of the SPD, it will be dropped. Each TC consists of a word or a succession of words and has the following definition : State of the relays State of the mux s Step 1 = On 1 = On 1 = On 1 = Right 1 = On RCmd LCmd RefCmd BalCmd SerCmd SsiCmd M14B2 M14B1 M14B0 M5B2 M5B1 M5B0 M6B2 M6B1 M6B0 STRE The definition of the State of the muxes will be given in the following chapters. RCmd and LCmd are not state defined but react on the edges. So passing from Hi to Lo or from Lo to Hi means moving the shutter. To know which move, you have to know the previous status of the shutter. When STRE is On the reference in the cavities is low. For the (RAD xx <= 16) STRE must be equal to 0. Page : 18

19 5.2.1 Radiometric TCs Commands Left Shutter Bit 14 Right Shutter Bit 15 RefCmd BalCmd SerCmd SsiCmd STRE Bit 13 Bit 12 Bit 11 Bit 10 Bit 0 RAD 02 Closed Closed RAD 03 Closed Closed RAD 04 Open Open RAD 05 Closed Closed RAD 06 Closed Closed RAD 07 Open Open RAD 08 Open Open RAD 09 Open Closed RAD 10 Closed Open RAD 11 Open Closed RAD 12 Closed Open RAD 13 Closed Closed RAD 14 Open Closed RAD 15 Closed Closed RAD 16 Closed Open RAD 17 Closed Closed RAD 18 Closed Closed RAD 19 Closed Closed RAD 20 Closed Closed RAD 21 Closed Closed RAD 22 Closed Closed RAD 23 Closed Closed Action : Effects : The SPD must set DIARAD in a specific radiometric state. - Activate the radiometric state specified in the TC. - Immediate TC. The nominal multiplexors addressing sequence during a radiometric cycle is defined as follow : Frame nu E E E Page : 19

20 Remark : The housekeeping channels are not calibrated during a radiometric cycle. This to prevent that their calibration introduce a difference between the calibration configuration and the main channel measurement configuration. The calibration of channels 5 and 6 is done by sending the specific "SMM ##" command explained in Contingency left voltage procedure, Contingency right voltage procedure, Contingency left current procedure, Contingency right current procedure, Contingency Reset 5 procedure, Contingency Reset 6 procedure. The function of 5 and 6 is to deliver the auxiliary parameters of the radiometer but they may also act as redundant channels for science acquisition in case of V/F 1 to 4 failure. As the Voltage calibration tensions are present at the input of Mux 5 and 6, we have to place them in a redundant mode to calibrate those channels. The error on this calibration is greater than on the science channels because we have two muxes in series in this case. As this is a second order error, it is negligible for the auxiliary parameters. Page : 20

21 5.2.2 Automatic sequences Commands : AUTO 000 AUTO 001 AUTO 002 AUTO 003 AUTO 004 AUTO 005 AUTO 006 AUTO 007 AUTO 008 AUTO 009 AUTO 010 AUTO 011 AUTO 012 AUTO 013 AUTO 014 AUTO 015 AUTO 016 AUTO 017 : Test without optical stimuli : Test with optical stimuli In this mode a Lamp Clock will be delivered each 90 sec starting high with the first rad state. : Active left sequence : Active right sequence : Compensation mode (mean of left and right measurements) : Angström mode left : Angström mode right : Working mode in case of left shutter close failure (stays open) : Working mode in case of right shutter close failure (stays open) : Active electrical balance : Radiative balance mode : Electric balance mode : Short left calibration : Short right calibration : Optical time response of servo both sides : Long calibration : Long Active left sequence : Long Active right sequence. Action : The PSD activate a sequence of predefined radiometric states explained in Effects : - Activate the appropriated sequence of radiometric states specified by the TC. - Immediate TC. AUTO 102 AUTO 103 AUTO 202 AUTO 203 : Double active left sequence : Double active right sequence : Triple active left sequence : Triple active right sequence Page : 21

22 Definition of the successive radiometric states to generate for each automatic sequences AUTOxxx Auto mode AUTO 000 AUTO 001 AUTO 002 AUTO 003 AUTO 004 AUTO 005 AUTO 006 AUTO 007 AUTO 008 AUTO 009 AUTO 010 AUTO 011 AUTO 012 Temporal radiometric states sequence : RAD xx 05,09,07,09,05,15,15,15,15,15,15,02,02,02,02,02, 02,14,04,16,02,13,13,13,13,13,13,03,03,03,03,03, 03,21,19,19,19,19,19,22,22,22,22,22,06,10,08,10, 11,12,17,18,20,20,20,20,23,23,23,23,21,21,10,06; 05,09,09ÀL,07ÀR,08ÀL,10,10ÀR,06,11,11ÀL,1 4ÀL,14,04,16ÀR,16,12,12ÀR,16,02,15,15,15,15,1 5,15,13,13,13,13,13,13,06; 09,05; 10,06; 11,12; 02,02,02,02,02,02,02,02,02,02,02,02,02,02,13,13, 13,13,13,13,13,13,13,13,13,13,13,13,14,14,14,14, 14,14,14,14,14,14,14,14,14,14,13,13,13,13,13,13, 13,13,13,13,13,13,13,13,02,02,02,02,02,02,02,02; 02,02,02,02,02,02,02,02,02,02,02,02,02,02,15,15, 15,15,15,15,15,15,15,15,15,15,15,15,16,16,16,16, 16,16,16,16,16,16,16,16,16,16,15,15,15,15,15,15, 15,15,15,15,15,15,15,15,02,02,02,02,02,02,02,02; 07,09; 08,10; 05,05,06,06; 07,07,08,08; 17,17,17,17,03,03,03,03,15,15,15,15,13,13,13,13, 21,21,21,21,20,20,20,20,19,19,19,19,18,18,18,18; 17,22,19,22,17,13,06,02; Page : 22

23 AUTO 013 AUTO 014 AUTO 015 AUTO 016 AUTO 017 AUTO 102 AUTO 103 AUTO 202 AUTO ,23,20,23,17,15,05,02,17,23,20,23,17,15,05,02; 05,05,09,09,05,05,09,09,05,05,09,09,05,05,09,09, 05,05,09,09,05,05,09,09,05,05,09,09,05,05,09,09, 06,06,10,10,06,06,10,10,06,06,10,10,06,06,10,10, 06,06,10,10,06,06,10,10,06,06,10,10,06,06,10,10; 02,03,03,03,03,03,03,21,21,21,21,21,21,19,19,19, 19,02,02,02,02,20,20,20,20,02,02,02,02,13,13,13, 13,13,13,02,02,02,02,02,02,15,15,15,15,15,15,02, 02,02,02,02,02,23,23,23,23,22,22,22,22,05,06,02; 05,09,09,09,09,09,09,09; 06,10,10,10,10,10,10,10; 09,09,05; 10,10,06; 09,05,09,09; 10,06,10,10; ÀL means lamp stimuli on left side. ÀR means lamp stimuli on right side. The table represented above is placed in the ROM of the DPU. There are 22 AUTO mode TCs (AUTO 000 to AUTO 017,AUTO 102, AUTO 103, AUTO 202, AUTO 203). Each of them consists of a serie of radiometric commands (RAD xx) sequence to send to DIARAD when an Auto TC is received by the DPU. The DPU will send these radiometric commands in an infinite loop until a new AUTO TC is received. Eg : The DPU receives the TC "AUTO 002". He send to DIARAD the first command in the table corresponding to AUTO 002 in this case "RAD 09". 90 seconds later, it will send "RAD 05" and so on until the end of the sequence is reached (1H36' later) when he will restart the same sequence and that in a infinite loop. Page : 23

24 5.2.3 Contingency left voltage procedure Command : SMM 10 Action : Activate the redundant left voltage channel. Effects : - Wait until the current radiometric cycle is finished (90 seconds cycle). - Generate a report if the status doesn't match the TC for each radiometric state of the command. - Change the usual addressing sequence of channel 5 by the address of channel Rd3 which is wired at the output of multiplexor 3. - Delayed TC. The multiplexor addressing sequence is explained hereafter : Frame Nu E E E Contingency right voltage procedure Command : SMM 20 Action : Activate the redundant right voltage channel. Effects : - Wait until the current radiometric cycle is finished (90 seconds cycle). - Generate a report if the status doesn't match the TC for each radiometric state of the command. - Change the usual addressing sequence of channel 5 by the address of channel Rd4 which is wired at the output of multiplexor 4. - Delayed TC. The multiplexor addressing sequence is explained hereafter : Frame Nu E E E Page : 24

25 5.2.5 Contingency left current procedure Command : SMM 01 Action : Activate the redundant left current channel. Effects : - Wait until the current radiometric cycle is finished (90 seconds cycle). - Generate a report if the status doesn't match the TC for each radiometric state of the command. - Change the usual addressing sequence of channel 6 by the address of channel Rd1 which is wired at the output of multiplexor 1. - Delayed TC. The multiplexor addressing sequence is explained hereafter : Frame Nu E E E Contingency right current procedure Command : SMM 02 Action : Activate the redundant right current channel. Effects : - Wait until the current radiometric cycle is finished (90 seconds cycle). - Generate a report if the status doesn't match the TC for each radiometric state of the command. - Change the usual addressing sequence of channel 6 by the address of channel Rd2 which is wired at the output of multiplexor 2. - Delayed TC. The multiplexor addressing sequence is explained hereafter : Frame Nu E E E Page : 25

26 5.2.7 Contingency Reset 5 procedure Command : SMM 0x Action : Set the multiplexor 5 to nominal. Effects : - Wait until the current radiometric cycle is achieved (90 seconds cycle). - Change the addressing sequence of channel 5 by the nominal address sequence defined in (this TC is redundant with a RADxx command). - Generate a report if the status doesn't match the TC for each radiometric state of the command. - Delayed TC. Remark : the x in the command name must be set to 0: nominal, 1 left or 2 right for the 6 wathever the experimenter wish Contingency Reset 6 procedure Command : SMM x0 Action : Sets the multiplexor 6 to nominal. Effects : - Wait until the current radiometric cycle is achieved (90 seconds cycle). - Change the addressing sequence of channel 6 by the nominal address sequence defined in (this TC is redundant with a RADxx command). - Generate a report if the status doesn't match the TC for each radiometric state of the command. - Delayed TC. Remark : the x in the command name must be set to 0: nominal, 1 left or 2 right for the 5 wathever the experimenter wish Calibration of the V/Fs Command : EVF Action : Measurement of the reference voltages. Effects : - Wait until the current radiometric cycle is achieved (90 seconds cycle). - Send the reference sequence to the multiplexors. - Delayed TC. The multiplexors addressing sequence during a calibration cycle is defined as follow : Frame Nu E E E Page : 26

27 5.3 Macrocommands Definitions - Macrocommands are defined as a series of AUTO or RAD sequences that have to be executed the one after the other. - The sun synchronisation pulse is defined as the moment when the space station interface gives a warning that the next solar pointing period will start. The sun synchronisation pulse is given 10 minutes before the guaranteed solar pointing. - The 'sun flag' is given by the sun photometers and indicates the presence (on) or not (off) of the sun for measurements. - One orbit sequence is defined as the period between two sun synchronisation pulses. - The DIARAD cycle has a time period of 90 s (9 frames) Macrocommand NORMAL The macrocommand NORMAL is defined as the alternation of 500 left normal orbit sequences with 1 right normal orbit sequence left normal orbit sequence - Receives sun synchronisation. - Wait 1 minute. - Send TC AUTO Loop AUTO 002 until the sun flag is off. - Continue to play AUTO 002 seven times (21'). - Send TC EVF. - Play EVF two times (3'). - Send TC AUTO Play AUTO 012 one time (12'). - Send TC AUTO Play AUTO 002 until a new sun synchronisation is received. - Restart from the beginning. Page : 27

28 right normal orbit sequence - Receives sun synchronisation. - Wait 1 minute. - Send TC AUTO Loop AUTO 003 until the sun flag is off. - Continue to play AUTO 003 seven times (21'). - Send TC EVF. - Play EVF two times (3'). - Send TC AUTO Play AUTO 013 one time (12'). - Send TC AUTO Play AUTO 003 until a new sun synchronisation is received. - Restart from the beginning Macrocommand DOUBLE The macrocommand DOUBLE is defined as the alternation of 500 left double orbit sequences with 1 right double orbit sequence left double orbit sequence - Receives sun synchronisation. - Wait 1 minute. - Send TC AUTO Loop AUTO 102 until the sun flag is off. - Continue to play AUTO 102 six times (27'). - Send TC EVF. - Play EVF two times (3'). - Send TC AUTO Play AUTO 012 one time (12'). - Send TC AUTO Play AUTO 102 until a new sun synchronisation is received. - Restart from the beginning. Page : 28

29 right double orbit sequence - Receives sun synchronisation. - Wait 1 minute. - Send TC AUTO Loop AUTO 103 until the sun flag is off. - Continue to play AUTO 103 six times (27'). - Send TC EVF. - Play EVF two times (3'). - Send TC AUTO Play AUTO 013 one time (12'). - Send TC AUTO Play AUTO 103 until a new sun synchronisation is received. - Restart from the beginning Macrocommand TRIPLE The macrocommand TRIPLE is defined as the alternation of 500 left triple orbit sequences with 1 right triple orbit sequence left triple orbit sequence - Receives sun synchronisation. - Wait 1 minute. - Send TC AUTO Loop AUTO 202 until the sun flag is off. - Continue to play AUTO 202 four times (24'). - Send TC EVF. - Play EVF two times (3'). - Send TC AUTO Play AUTO 012 one time (12'). - Send TC AUTO Play AUTO 202 until a new sun synchronisation is received. - Restart from the beginning. Page : 29

30 right triple orbit sequence - Receives sun synchronisation. - Wait 1 minute. - Send TC AUTO Loop AUTO 203 until the sun flag is off. - Continue to play AUTO 203 four times (24'). - Send TC EVF. - Play EVF two times (3'). - Send TC AUTO Play AUTO 013 one time (12'). - Send TC AUTO Play AUTO 203 until a new sun synchronisation is received. - Restart from the beginning STARTUP macrocommand The STARTUP macrocommand has to be executed after every power on of the DIARAD radiometer. It executes : - Send TC RAD Play one time RAD 04 (1.5'). - Send TC RAD Play one time RAD 06 (1.5'). - Send TC AUTO Play one time AUTO 002 (3'). - Set to NORMAL macrocommand mode DEEP sequence The DEEP sequence interrupts the execution of a previous macrocommand. TC AUTO 002 is sent and executed ten times (30'). Afterwards the execution of the previous macrocommand is resumed. Page : 30

31 6 Acronyms Cmd : CPM : CPU : DIDIM : DPU : FIFO : IRMB : IRQ : : PID : PON : POFF : Ram : SIM : SPD : Stat : TBD : TC : TIM : TM : UIM : V/F : XPID : Xtal : Command Central Processing Module Central Processing Unit Diarad Interface Document sovim Digital Processing Unit First In First Out Institut Royal Météorologique de Belgique Processor Interrupts Multiplexors Packet Identifier Power On Power Off Random access memory Spacecraft Interface Module Science program DIARAD Status To Be Defined Telecommand Timer Interrupt Module Telemetry User Interface Module Voltage to frequency converter Auxilliary PID Cristal, Quartz Page : 31